#loading-box{
  height: 100vh;
  width: 100vw;
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  background-color: #374140;
}
.loading{
  width: 100%;
  height: 40px;
  margin: auto;
  text-align: center;
}

.loading span{
  display: inline-block;
  width: 8px;
  height: 100%;
  border-radius: 4px;
  background: lightgreen;
  -webkit-animation: load 1s ease infinite;
  animation: load 1s ease infinite;
}



@-webkit-keyframes load{
  0%,100%{
    height: 40px;
    background: lightgreen;
  }
  50%{
    height: 70px;
    margin: -15px 0;
    background: lightblue;
  }
}
.loading span:nth-child(2){
  -webkit-animation-delay:0.2s;
  animation-delay:0.2s;
}
.loading span:nth-child(3){
  -webkit-animation-delay:0.4s;
  animation-delay:0.4s;
}
.loading span:nth-child(4){
  -webkit-animation-delay:0.6s;
  animation-delay:0.6s;
}
.loading span:nth-child(5){
  -webkit-animation-delay:0.8s;
  animation-delay:0.8s;
}